Year	current US$
2009	18492514
2010	11301002
2011	8259133
2012	10978416
2013	14208170
2014	13835438
2015	5765833
2016	6875574
2017	5350848
2018	6498091
2019	34843264
2020	4097238.9999999995
2021	3595403
2022	3443803